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Question

In the formation of a chloride ion, from an isolated gaseous chloride atom. 3.8 eV energy is released, which would be equal to__________.
  1. ionisation potential of Cl
  2. electron affinity of Cl
  3. electronegativity of Cl
  4. ionisation potential of Cl

A
electronegativity of Cl
B
ionisation potential of Cl
C
electron affinity of Cl
D
ionisation potential of Cl
Solution
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3.8 eV energy is released on adding one electron so this is the same amount which will be needed to remove the same electron. Hence, we can say that Ionisation potential of Cl is 3.8 eV.

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